采用细致平衡原理,将太阳,环境作为辐射体,只考虑电池辐射复合,建立了太阳电池的模型.通过模拟,得出单结太阳电池的极限效率为31％,当使用上转换器时,单结电池的极限效率增至47.3％；对于双结电池,当顶电池带隙宽度为1.7 eV,底电池带隙宽度从1.1 eV变化到1.5eV,模拟的最大效率为39.9％,有上转换器最大时效率提高到了47.4％.
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